I would say you are too cheap, your attracting the lower end of the market and unfortunately with the recession that end of the market isnt spending at the moment.
I did a job last week for a posh old lady and she was a bit put out that i only charged her 250+ vat for a lounge 2 single beds and 2 chairs, I was done in 2 half hours, she gave me 2 tips, a tenner and put my prices up !!
You have to be smart, tidy equipment and a clean vehicle, and come over very professional.
Try targeting posh areas at higher prices, there are plenty snobs out there